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void Key_Proc(void) { if(uwTick - uwTick_K...
电路#include "main.h" #include "led\bsp_led.h" #i...
SysTick定时器一次最多可以计数2^24(24bit)个时钟脉冲,这个脉冲计数值保存在当前计数值寄存器STK_VAL(Systic...
HAL_Init()@note HAL_Init() function is called at the beginning of...
74HC573工作原理74HC573的八个锁存器都是透明的D型锁存器,当使能(G)为高时,Q输出将随数据(D)输入而变。当使能为低时,...